Equipment for measuring acidity of petroleum product

Abstract

The utility model relates to the technical field of petroleum product detection, in particular to petroleum product acidity measuring equipment and measuring method.The petroleum product acidity measuring equipment comprises a machine body, a rotary disc mechanism, a heating, boiling, cooling and backflow mechanism, a titration mechanism, a digital camera-machine vision device and a controller, and the rotary disc mechanism, the heating, boiling, cooling and backflow mechanism, the titration mechanism and the digital camera-machine vision device are arranged on the machine body; the rotary table mechanism comprises a rotatable rotary table, stations for bearing sample bottles are arranged on the rotary table, the rotary table comprises a first station, a second station and a third station, and the digital camera-machine vision detection mechanism transmits shot color information of samples in the sample bottles to the controller; the controller judges a titration end point according to the color change and displays a measurement result; the acidity measuring equipment for the petroleum product can run in a full-automatic manner, is simple and convenient to operate, and improves the working efficiency and the measuring precision.

Description

Technical Field

[0001] This application relates to the field of petroleum product testing technology, and in particular to a device for determining the acidity of petroleum products. Background Technology

[0002] Fully automatic diesel and other petroleum product acidity testers are used to determine the acidity of gasoline, kerosene, diesel, and light petroleum products without added ethanol. The principle of this type of instrument is to extract the acidic components from the sample with ethanol, and then titrate with an alkaline solution under the condition of adding a color indicator, thereby obtaining the product's acid value.

[0003] Currently, the fully automated acidity determination of diesel and other petroleum products follows the People's Republic of China National Standard "Determination of Acidity of Light Petroleum Products" (GB / T 258-2016). However, the heating, boiling, cooling, and reflux of the sample, the addition of the indicator, and the titration of the titrant are all performed manually. This process is cumbersome, prone to human error, and inefficient. Utility Model Content

[0004] The purpose of this application is to provide a petroleum product acidity measuring device that can operate fully automatically, is easy to operate, and improves work efficiency and measurement accuracy.

[0005] To this end, in a first aspect, this application provides a petroleum product acidity measuring device, including a body and a turntable mechanism, a heating-boiling-cooling-reflux mechanism, a titration mechanism, a digital camera-machine vision inspection mechanism, and a controller disposed on the body; the turntable mechanism includes a rotatable turntable, which includes a first station, a second station, and a third station; the first station is used for placing one blank sample bottle, two sample bottles, and one waste bottle, and the first station is provided with a positioning part for supporting the sample bottle; the second station is used for the heating-boiling-cooling-reflux mechanism to heat, boil, cool, and reflux the sample in the sample bottle at the second station; the third station is used for the titration mechanism to automatically add an indicator and titration solution to the sample bottle at the third station; the turntable mechanism, the heating-boiling-cooling-reflux mechanism, the titration mechanism, and the digital camera-machine vision inspection mechanism are electrically connected to the controller, the digital camera-machine vision inspection mechanism transmits the color information of the sample in the sample bottle captured by the digital camera-machine vision inspection mechanism to the controller, and the controller determines the titration endpoint based on the color change and displays the measurement result.

[0006] In one possible implementation, the heating-boiling-cooling-reflux mechanism includes: a lifting assembly disposed below the turntable, the lifting assembly including a vertically movable support plate for lifting a sample bottle located at a second station; a heating assembly disposed on the support plate for heating the sample bottle; and a condensing assembly disposed above the turntable, the condensing assembly having a condensing chamber for communicating with the bottle neck of the sample bottle.

[0007] In one possible implementation, the heating-boiling-cooling-reflux mechanism also includes a detection component for detecting liquid reflux from the condensation component, the detection component being electrically connected to a controller.

[0008] In one possible implementation, the titration mechanism includes: a column mounted on the machine body; a lifting assembly mounted on the column, the lifting assembly including a lifting plate that can slide vertically; a titration assembly mounted on the lifting plate, the titration assembly including a burette and a titration nozzle mounted at the bottom of the burette; a rotating disk rotatably mounted at the bottom of the column; and an indicator assembly including an indicator reservoir and an indicator pipette tip mounted on the rotating disk; wherein the titration nozzle can be inserted into the indicator pipette tip and draws indicator from the indicator reservoir.

[0009] In one possible implementation, the indicator tip has an interface and inlet / outlet ports arranged opposite to each other, the interface for inserting a burette, and the inlet / outlet ports for drawing in and discharging the indicator.

[0010] In one possible implementation, the titration assembly also includes a titrant reservoir and a precision burette, the precision burette connecting the titrant reservoir and the titration connecting rod.

[0011] In one possible implementation, the digital camera-machine vision inspection mechanism includes an illumination unit and a digital camera, which are located on opposite sides of the third station. The digital camera is used to capture the color change of the sample inside the sample vial under the illumination of the light source in real time and send the data to the controller for data processing.

[0012] A method for determining the acidity of petroleum products, using the aforementioned petroleum product acidity determining equipment, includes the following steps: transporting a sample bottle via a turntable; heating, boiling, cooling, and refluxing the sample in the sample bottle at the second station using a heating, boiling, cooling, and reflux mechanism to remove gas from the sample; automatically adding an indicator and a titrating solution sequentially to the sample bottle at the third station using a titration mechanism; and photographing and analyzing the color inside the sample bottle and determining the endpoint using a digital camera-machine vision inspection mechanism.

[0013] In one feasible implementation, the heating-boiling-cooling-reflux mechanism includes: a lifting assembly disposed below the turntable, the lifting assembly including a vertically movable support plate for lifting the sample bottle located at the second station; a heating assembly disposed on the support plate for heating the sample bottle; and a condensing assembly disposed above the turntable, the condensing assembly having a condensing chamber for connecting to the bottle opening of the sample bottle; the heating-boiling-cooling-reflux mechanism for heating, boiling, cooling, and refluxing the sample in the sample bottle at the second station includes: the lifting assembly lifting the sample bottle and aligning the bottle opening with the condensing chamber; the heating assembly heating the sample bottle; and the condensing assembly cooling and refluxing the gas entering the condensing chamber.

[0014] In one possible implementation, the heating-boiling-cooling-reflux mechanism further includes a detection component for detecting liquid reflux in the condensing component, and the detection component is electrically connected to a controller; the heating-boiling-cooling-reflux of the sample in the sample bottle at the second station through the heating-boiling-cooling-reflux mechanism further includes: when the detection component detects liquid reflux in the condensing component, the heating component continues to operate to boil the sample for 5 minutes.

[0015] According to the petroleum product acidity testing equipment provided in this application, the equipment places the sample bottle at the first station of a turntable. After the equipment is started, the turntable automatically rotates, sequentially delivering the sample bottle to the heating, boiling, cooling, reflux, titration, and detection stations. The entire process is automatically controlled by a controller, greatly reducing human error. This achieves full automation of petroleum product acidity testing, improving testing efficiency and accuracy. The turntable mechanism enables automatic sample transfer, reducing manual operation. The heating, boiling, cooling, and reflux mechanism removes gases from the sample, improving testing accuracy. The combination of the titration mechanism and the digital camera-machine vision inspection mechanism enables precise titration and endpoint determination, improving operational efficiency and testing accuracy. Attached Figure Description

[0016] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with the present invention and, together with the description, serve to explain the principles of the present invention.

[0017] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, for those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] One or more embodiments are illustrated by way of example with reference numerals in the accompanying drawings. These illustrations do not constitute a limitation on the embodiments. Elements with the same reference numerals in the drawings are denoted as similar elements. Unless otherwise stated, the figures in the drawings are not to be limited by scale.

[0019] Figure 1 This illustration shows a structural schematic diagram of a petroleum product acidity measuring device provided in an embodiment of this application;

[0020] Figure 2 This diagram illustrates the structure of a turntable mechanism and a heating, boiling, cooling, and reflux mechanism according to an embodiment of this application.

[0021] Figure 3 This diagram illustrates the structure of a titration mechanism provided in an embodiment of this application.

[0022] Figure 4 This diagram shows a top view of a rotating disk and indicator assembly provided in an embodiment of this application.

[0023] Figure 5 The figure shows a schematic diagram of a sample bottle and a digital camera-machine vision system provided in an embodiment of this application;

[0024] Figure 6 This document shows a flowchart of a method for determining the acidity of petroleum products according to an embodiment of this application.

[0025] Explanation of reference numerals in the attached figures:

[0026] a. Sample bottle;

[0027] 1. Organism;

[0028] 2. Turntable mechanism; 21. Turntable;

[0029] 3. Heating, boiling, cooling, and reflux mechanism; 31. Lifting assembly; 311. Pallet; 32. Heating assembly; 33. Condensation assembly;

[0030] 4. Titration mechanism; 41. Column; 42. Lifting assembly; 43. Titration assembly; 431. Titration connecting rod; 432. Dropper; 433. Titrate storage tank; 434. Precision burette; 44. Rotary disk; 45. Indicator assembly; 451. Indicator storage tank; 452. Indicator pipette tip;

[0031] 5. Digital camera - machine vision; 51. Illumination unit; 52. Digital camera;

[0032] 6. Controller. Detailed Implementation

[0033] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0034] The following disclosure provides many different embodiments or examples for implementing different structures of the embodiments of this application. To simplify the disclosure of the embodiments of this application, components and arrangements of specific examples are described below. Of course, these are merely examples and are not intended to limit the embodiments of this application. Furthermore, reference numerals and / or letters may be repeated in different examples of the embodiments of this application. Such repetition is for simplification and clarity and does not in itself indicate a relationship between the various embodiments and / or arrangements discussed.

[0035] For ease of description, spatial relative terms may be used in the text to describe the relative position or movement of one element or feature relative to another element or feature, as shown in the figure. These relative terms include, for example, "inside," "outside," "middle," "outer," "below," "below," "above," "front," "back," etc. Such spatial relative terms are intended to include different orientations of the device in use or operation, other than those depicted in the figure. For example, if the device in the figure undergoes a positional flip, orientation change, or change of motion, these directional indications will change accordingly. For instance, an element described as "below other elements or features" or "below other elements or features" will subsequently be oriented "above other elements or features" or "above other elements or features." Therefore, the example term "below" can include both upper and lower orientations. The device may be otherwise oriented (rotated 90 degrees or in other directions), and the spatial relative descriptors used in the text will be interpreted accordingly.

[0036] To address the problems in the prior art, this application provides a petroleum product acidity measuring device that can operate fully automatically, is easy to operate, and improves work efficiency and measurement accuracy.

[0037] Figure 1 This illustration shows a structural schematic diagram of a petroleum product acidity measuring device provided in an embodiment of this application; Figure 2 This diagram illustrates the structure of a turntable mechanism and a heating, boiling, cooling, and reflux mechanism according to an embodiment of this application. Figure 3 This diagram illustrates the structure of a titration mechanism provided in an embodiment of this application. Figure 4This diagram shows a top view of a rotating disk and indicator assembly provided in an embodiment of this application. Figure 5 The figure shows a schematic diagram of a sample bottle and a digital camera-machine vision inspection mechanism provided in an embodiment of this application.

[0038] like Figure 1-5 As shown in the embodiment of this application, an acidity testing device for petroleum products is provided, including a body 1 and a turntable mechanism 2, a heating-boiling-cooling-reflux mechanism 3, a titration mechanism 4, a digital camera-machine vision inspection mechanism 5, and an electronic controller 6 disposed on the body 1; the turntable mechanism 2 includes a rotatable turntable 21, on which a positioning part for carrying a sample bottle a is provided; the turntable 21 includes a first station, a second station, and a third station; the first station is used for placing one blank sample bottle, two sample bottles, and one waste bottle; the first station is provided with a positioning part for carrying the sample bottle. The positioning section; the second station is used for the heating, boiling, cooling and reflux mechanism, so as to heat, boil, cool and reflux the sample in the sample bottle in the second station; the third station is used for the titration mechanism, which automatically adds indicator and titration solution to the sample bottle in the third station; the turntable mechanism 2, the heating, boiling and cooling reflux mechanism 3, the titration mechanism 4 and the digital camera-machine vision 5 are electrically connected to the controller 6. The digital camera-machine vision 5 transmits the color information of the sample in the sample bottle a captured by the digital camera-machine vision 5 to the controller 6. The controller 6 determines the titration endpoint based on the color change and displays the measurement result.

[0039] This application provides an acidity testing device for petroleum products, comprising a main body 1, a turntable mechanism 2, a heating, boiling, cooling, and reflux mechanism 3, a titration mechanism 4, a digital camera-machine vision system 5, and a controller 6. The turntable mechanism 2 includes a rotatable turntable 21 with a positioning structure for supporting sample vials a, and has three stations. The heating, boiling, cooling, and reflux mechanism 3 is located at the second station, and the titration mechanism 4 and the digital camera-machine vision system 5 are located at the third station. Each mechanism is connected to the electronic controller 6. The digital camera-machine vision system 5 transmits captured color information to the controller 6 in real time. The digital camera-machine vision system 5 determines the acidity color endpoint of the petroleum product, and the controller 6 determines the titration endpoint based on the color change and displays the result, thereby improving the accuracy and convenience of the measured values.

[0040] In related technologies, traditional fully automated methods for determining the acidity of diesel and other petroleum products usually rely on manual operation, which has the following problems: cumbersome operation and long time consumption; large human error, affecting the accuracy of the measurement; insufficient sample heating, boiling, cooling and reflux, which may affect the measurement results; and strong subjectivity in judging the titration endpoint, which may lead to different results from different operators.

[0041] In this application, the operator only needs to place the sample bottle a at the first station of the turntable 21. After starting the equipment, the turntable 21 will automatically rotate, sequentially sending the sample bottle a to the heating, boiling, cooling, reflux, titration, and detection stations. The entire process is automatically controlled by the electronic controller 6, greatly reducing human error. This achieves full automation of the acidity determination of diesel and other petroleum products, improving measurement efficiency and accuracy. The turntable mechanism 2 enables automatic transfer of one blank sample and two test samples, reducing manual operation. The heating, boiling, cooling, and reflux mechanism 3 removes gas from the sample, improving measurement accuracy. The coordination of the titration mechanism 4 and the digital camera-machine vision detection mechanism 5 enables precise titration and endpoint determination. A single experiment can complete the titration of the acidity of one blank sample and two oil samples. The final acidity of the oil sample is the average of the acidity of the two oil samples minus the acidity of the blank sample, improving the accuracy of petroleum product acidity determination.

[0042] Specifically, the digital camera-machine vision inspection mechanism 5 refers to a system that uses machine vision technology to acquire images through a camera and analyzes color changes using image processing algorithms. In this invention, the digital camera-machine vision inspection mechanism 5 replaces human eye observation, improving the objectivity and accuracy of titration endpoint determination.

[0043] Specifically, this equipment can be applied to quality control laboratories in oil refineries, customs, quality inspection, sales and other units.

[0044] Optionally, a fourth station can be added to the turntable 21 for sample pretreatment, such as adding solvent.

[0045] In some embodiments, the heating, boiling, cooling, and reflux mechanism 3 includes: a lifting assembly 31 disposed below the turntable 21, the lifting assembly 31 including a vertically movable support plate 311 for lifting the sample bottle a located at the second station; a heating assembly 32 disposed on the support plate 311 for heating the sample bottle a; and a condensing assembly 33 disposed above the turntable 21, the condensing assembly 33 having a condensing chamber for communicating with the mouth of the sample bottle a.

[0046] This application further defines the structure of the heating-boiling-cooling-reflux mechanism 3, including a lifting assembly 31, a heating assembly 32, and a condensing assembly 33. The lifting assembly 31 is used to lift the sample bottle a, the heating assembly 32 is used to heat the sample bottle a, and the condensing assembly 33 is used to cool the refluxed evaporated gas. In practical applications, when the sample bottle a rotates to the second position, the support plate 311 of the lifting assembly 31 rises, lifting the sample bottle a. Simultaneously, the condensing assembly 33 descends and aligns with the mouth of the sample bottle a. The heating assembly 32 begins heating, and the volatile substances in the sample are evaporated, condensed, and refluxed after entering the condensing chamber. This process effectively removes gas from the sample, improving the accuracy of subsequent measurements.

[0047] In related technologies, traditional heating-boiling-cooling-reflux methods often require manual operation, which has the following problems: the operation is complicated and can easily cause sample leakage or contamination; the heating temperature is not easy to control, which may affect the heating-boiling-cooling-reflux effect; and the condensation effect is poor, which may cause harmful gas emissions.

[0048] In this application, the lifting component 31 realizes the automatic lifting and lowering of the sample bottle a, which facilitates docking with the condensing component 33; the heating component 32 can control the heating temperature to adapt to the heating, boiling, cooling and reflux requirements of different samples; the condensing component 33 can effectively condense and reflux.

[0049] Optionally, a refrigeration device can be added to the condensing assembly 33 to further improve condensation efficiency. A sealing ring can be added to the lifting assembly 31 to improve the sealing between the sample bottle a and the condensing assembly 33.

[0050] The lifting component 31 in this application refers to a mechanism capable of vertical movement, which is used in this utility model to automatically adjust the position of the sample bottle a and achieve docking with other components.

[0051] In some embodiments, the heating-boiling-cooling-reflux mechanism 3 further includes a detection component for detecting the liquid reflux of the condensation component 33, and the detection component is connected to the electronic controller 6.

[0052] This application further adds a detection component for detecting liquid reflux in the condenser assembly 33, and connects it to the electronic controller 6. In practical applications, a level sensor or photoelectric sensor can be installed on the reflux pipe of the condenser assembly 33. When liquid reflux is detected, the sensor sends a signal to the electronic controller 6. The controller 6 controls the heating assembly to continuously heat the sample to boiling for 5 minutes.

[0053] In related technologies, the traditional heating-boiling-cooling-reflux method often relies on the operator's experience to determine the end point of the heating-boiling-cooling-reflux process, which has the following problems: strong subjectivity, with different operators potentially reaching different conclusions; difficulty in precisely controlling the heating-boiling-cooling-reflux time, which may lead to energy waste or insufficient heating-boiling-cooling-reflux; and lack of real-time data on the heating-boiling-cooling-reflux process, which is not conducive to process optimization.

[0054] In this application, the reflux of condensate is monitored in real time, with a 5-minute timer starting from the first drop of refluxed liquid; this avoids overheating and boiling, and cools the reflux, saving time and energy.

[0055] Specifically, the detection component refers to a device that can sense and measure specific physical quantities. In this invention, it is used to monitor the reflux of condensate and provide a decision basis for the controller 6.

[0056] In some embodiments, the titration mechanism 4 includes: a column 41 disposed on the body 1; a lifting assembly 42 disposed on the column 41, the lifting assembly 42 including a lifting plate that can slide in a vertical direction; a titration assembly 43 disposed on the lifting plate, the titration assembly 43 including a titration connecting rod 431 and a titration nozzle 432 disposed at the bottom of the titration connecting rod 431; a rotating disk 44 rotatably disposed at the bottom of the column 41; and an indicator assembly 45 including an indicator reservoir 451 disposed on the rotating disk 44 and an indicator suction head 452; wherein the titration nozzle 432 can be inserted into the indicator suction head 452 and draws the indicator from the indicator reservoir 451.

[0057] This application details the structure of the titration mechanism 4, including a column 41, a lifting assembly 42, a titration assembly 43, a rotating disk 44, and an indicator assembly 45. The titration assembly 43 includes a titration connecting rod 431 and a burette 432, which can be inserted into the indicator pipette 452 to draw the indicator. In practical application, when sample vial a reaches the third position, the lifting assembly 42 drives the titration assembly 43 to descend. First, the burette 432 inserts into the indicator pipette 452 to draw a preset amount of indicator. Then, the titration assembly 43 rises, and the rotating disk 44 rotates, aligning the burette 432 with sample vial a. The titration assembly 43 descends again, dripping the indicator into sample vial a. Afterward, the titration assembly 43 begins adding the titration solution, while a digital camera-machine vision inspection mechanism 5 monitors the color change.

[0058] In related technologies, traditional titration methods have the following problems: manual titration is prone to over- or under-tipping, affecting the accuracy of the measurement; the amount of indicator added is difficult to control precisely; and cross-contamination of reagents may occur during the titration process.

[0059] In this application, the titration process is automated, improving operational efficiency and accuracy; the cooperation between the lifting component 42 and the rotating disk 44 enables the burette 432 to be precisely positioned; the design of the indicator component 45 enables the automatic addition of the indicator, avoiding errors caused by manual operation.

[0060] Optionally, multiple titration connecting rods 431 can be added to the titration assembly 43 for titration of different reagents.

[0061] Specifically, the titration component 43 refers to a device that can precisely control the addition of liquid, which in this invention is used to automatically complete the process of adding the indicator and titrating the solution.

[0062] In some embodiments, the indicator tip 452 has an interface and an inlet / outlet port disposed opposite to each other. The interface is used to insert the dropper 432, and the inlet / outlet port is used to draw in and dispense the indicator.

[0063] This application further defines the structure of the indicator tip 452, which has an interface and inlet / outlet ports arranged opposite to each other. The interface is used to insert the burette 432, and the inlet / outlet ports are used to draw in and dispense the indicator. In practical applications, when the burette 432 descends, it first aligns with the interface of the indicator tip 452. Then, the titration assembly 43 draws in the indicator through the inlet / outlet ports using negative pressure. When it is necessary to release the indicator, the titration assembly 43 generates positive pressure, and the indicator is precisely dripped into the sample vial a through the inlet / outlet ports.

[0064] In related technologies, traditional indicator addition methods have the following problems: manual addition of indicators can easily lead to inaccurate dosage; cross-contamination of reagents may occur; and it is difficult to achieve automated operation.

[0065] In this application, a quick and accurate connection between the burette 432 and the indicator tip 452 is achieved; cross-contamination is avoided by separating the connector and the inlet / outlet ports; and the accurate aspiration and release of the indicator is facilitated, thereby improving titration accuracy.

[0066] Specifically, the insertion interface and liquid inlet / outlet holes refer to dedicated interfaces used to achieve mechanical connection and liquid transfer. In this utility model, they are used to achieve precise docking of the dropper tip 432 and the indicator tip 452 and liquid transfer.

[0067] In some embodiments, the titration assembly 43 further includes a titrant reservoir 433 and a precision burette 434, the precision burette 434 being connected to the titrant reservoir 433 and the titration connecting rod 431.

[0068] This application further describes that the titration assembly 43 also includes a titrant reservoir 433 and a precision burette 434, with the precision burette 434 connecting the titrant reservoir 433 and the titration connecting rod 431. In practical applications, the titrant reservoir 433 can be positioned in a safe location on the equipment and connected to the precision burette 434 via a pipeline. According to the instructions of the controller 6, the titrant is precisely delivered to the titration connecting rod 431. This allows for continuous titration operations over extended periods without the need for frequent titrant replacement.

[0069] In related technologies, traditional titration devices have the following problems: the titrant needs to be added manually frequently, which affects work efficiency; open titrant containers are easily contaminated by the environment; and the amount of titrant added is difficult to control precisely.

[0070] In this application, automatic replenishment of titrant is achieved, improving continuous working capability; the amount of titrant added is precisely controlled by the precision burette 434, improving measurement accuracy; and the closed design reduces the volatilization and contamination of titrant.

[0071] Specifically, the precision burette 434 refers to a device that can precisely control the flow rate of liquid, and in this utility model, it is used to realize the automatic and precise delivery of titrant.

[0072] Optionally, multiple titrant storage tanks 433 can be set up for different types of titrants. A level sensor can be added to the titrant storage tank 433 to achieve real-time monitoring of the titrant balance.

[0073] In some embodiments, the digital camera-machine vision inspection mechanism 5 includes an illumination unit 51 and a digital camera 52. The digital camera 52 and the illumination unit 51 are located on opposite sides of the third station. The digital camera 52 is used to capture the color change of the sample in the sample bottle a under the illumination of the light source and send it to the controller 6 for data processing.

[0074] This application describes in detail the structure of the digital camera-machine vision inspection mechanism 5, including an illumination unit 51 and a digital camera 52. The illumination unit 51 and the digital camera 52 are located on opposite sides of the third station. The digital camera 52 is used to capture the color change of the sample in the sample bottle a under the illumination of the light source and send it to the controller 6 for data processing.

[0075] In practical applications, when sample vial a reaches the third station, the illumination unit 51 is activated, providing a stable background light source. The digital camera 52 captures the color changes of the sample solution using the principle of transmitted light. The controller 6 determines the titration endpoint based on a preset color threshold. The entire process can be displayed in real-time on a monitoring screen, allowing operators to remotely monitor it.

[0076] In related technologies, traditional methods for determining the titration endpoint have the following problems: human observation is highly subjective and easily affected by ambient light; it is difficult to capture minute color changes; and it is impossible to record and replay the titration process, which is not conducive to problem analysis.

[0077] In this application, real-time monitoring of the titration process is achieved, improving the accuracy of endpoint determination; transmitted light detection reduces ambient light interference and improves detection sensitivity; and the color change throughout the titration process can be recorded, facilitating subsequent analysis and optimization.

[0078] This petroleum product acidity testing equipment places sample bottle a at the first station of a turntable 21. Upon startup, the turntable 21 automatically rotates, sequentially delivering sample bottle a to the heating, boiling, cooling, reflux, titration, and detection stations. The entire process is automatically controlled by controller 6, significantly reducing human error. This achieves full automation of petroleum product acidity testing, improving efficiency and accuracy. The turntable mechanism 2 enables automatic transfer of one blank sample and two test samples, reducing manual operation. The heating, boiling, cooling, and reflux mechanism 3 removes gas from the sample, improving measurement accuracy. The coordination of the titration mechanism 4 and the digital camera-machine vision inspection mechanism 5 enables precise titration and endpoint determination, further enhancing operational efficiency and measurement accuracy.

[0079] Figure 6 This document shows a flowchart of a method for determining the acidity of petroleum products according to an embodiment of this application.

[0080] like Figure 6 As shown, this application provides a method for determining the acidity of petroleum products, using the aforementioned petroleum product acidity determination equipment. The determination method includes:

[0081] S1. The sample bottle a is transported via turntable 21 (including 1 blank sample bottle and 2 sample bottles).

[0082] S2. The sample in the sample bottle a at the second station is heated, boiled, cooled and refluxed by the heating, boiling and cooling reflux mechanism 3 to remove the gas in the sample.

[0083] S3. Indicator and titration solution are sequentially added to sample bottle a located at the third station through titration mechanism 4;

[0084] S4. The color inside the sample bottle a is photographed and analyzed by the digital camera-machine vision inspection mechanism 5, and the titration mechanism 4 is controlled by the controller 6 to complete the addition of the titration solution. Then, the endpoint of the sample is determined by the digital camera-machine vision inspection mechanism 5, and the result is obtained and displayed.

[0085] This application describes a method for determining the acidity of petroleum products using the aforementioned equipment, including steps such as sample transport, heating-boiling-cooling-reflux, titration, and color analysis. In practical applications, the operator only needs to place sample bottle a (including one blank sample bottle and two sample bottles) at the first station of the turntable 21 and then start the equipment. The equipment automatically completes the following steps: the turntable 21 rotates, sending sample bottle a to the heating-boiling-cooling-reflux station; the heating-boiling-cooling-reflux mechanism 3 heats, boils, cools, and refluxes the sample to remove gas; the turntable 21 rotates again, sending sample bottle a to the titration station; the titration mechanism 4 adds the indicator and titration solution; the digital camera-machine vision inspection mechanism 5 monitors the color change in real time, and the controller 6 determines the titration endpoint. The above steps are repeated to complete the titration of one blank sample and two samples in sequence. The final acidity result is the average acidity of the two samples excluding the blank.

[0086] Compared to existing technologies, which suffer from cumbersome and time-consuming procedures, potential sample contamination or loss between steps, and repeatability and accuracy issues due to manual operation, this application achieves full automation of the measurement process, improving work efficiency; standardized operating procedures reduce human error; and the integration of multiple measurement steps enhances the accuracy and reliability of the results.

[0087] Optionally, a sample pretreatment step, such as solvent addition or dilution, can be added to the method.

[0088] Optionally, a workflow for processing multiple samples in parallel can be designed to further improve efficiency.

[0089] In some embodiments, the heating-boiling-cooling-reflux mechanism 3 includes: a lifting assembly 31 disposed below the turntable 21, the lifting assembly 31 including a vertically movable support plate 311 for lifting the sample bottle a located at the second station; a heating assembly 32 disposed on the support plate 311 for heating the sample bottle a; and a condensing assembly 33 disposed above the turntable 21, the condensing assembly 33 having a condensing chamber for communicating with the bottle mouth of the sample bottle a; the heating-boiling-cooling-reflux mechanism 3 for heating, boiling, cooling, and refluxing the sample in the sample bottle a at the second station includes:

[0090] S21, the lifting assembly 31 completes the lifting of sample bottle a and connects the bottle mouth of sample bottle a with the condensation chamber.

[0091] S22, heating component 32 heats sample bottle a; condensing component 33 condenses the gas entering the condensing chamber.

[0092] This application further describes in detail the heating, boiling, cooling, and reflux process, including three steps: lifting the sample bottle a, heating, and gas condensation. In practical applications, when sample bottle a reaches the second station: the lifting assembly 31 lifts the sample bottle a, aligning the bottle opening with the condensation chamber; the heating assembly 32 begins heating the sample bottle a; and the condensation assembly 33 condenses the evaporated gas, with the condensate flowing back into the sample bottle a.

[0093] Traditional heating-boiling-cooling-reflux methods have the following problems: manual operation can easily lead to sample leakage or contamination; the heating temperature is difficult to control precisely, affecting the heating-boiling-cooling-reflux effect; and open heating-boiling-cooling-reflux systems may lead to the emission of harmful gases. In contrast, this application achieves an automated heating-boiling-cooling-reflux process, reducing manual operation; precisely controlled heating and condensation processes improve the heating-boiling-cooling-reflux effect; and the efficient heating-boiling-cooling-reflux system avoids sample contamination.

[0094] Optionally, a temperature gradient can be added to the condensation assembly 33 to achieve more efficient gas condensation. An adjustable lifting height can also be designed to accommodate sample vials a of different heights.

[0095] The "heating-boiling-cooling-reflux" method refers to a separation method that evaporates volatile components in a liquid by heating, followed by condensation and collection. In this invention, the heating-boiling-cooling-reflux process is used to remove gases from the sample, improving the accuracy of subsequent measurements.

[0096] In some embodiments, the heating-boiling-cooling-reflux mechanism 3 further includes a detection component for detecting the liquid reflux of the condensation component 33, and the detection component is connected to the controller 6; the heating-boiling-cooling-reflux process for the sample in the sample bottle a at the second station via the heating-boiling-cooling-reflux mechanism 3 further includes:

[0097] S23. When the detection component detects the liquid backflow of the condenser 33, the heating component 32 continues to heat the sample to boiling for 5 minutes.

[0098] This application adds a detection component for detecting liquid reflux in the condenser assembly 33. When liquid reflux is detected, the heating assembly 32 continuously heats the sample to boiling for 5 minutes. In practical applications, a liquid sensor can be installed on the reflux pipe of the condenser assembly 33. When the sensor detects liquid reflux, it sends a signal to the controller 6. This controls the heating assembly 32 to continuously heat the sample to boiling for 5 minutes, and then automatically stops heating. This ensures the sufficiency and consistency of the heating-boiling-cooling-reflux process.

[0099] Traditional heating-boiling-cooling-reflux methods suffer from the following problems: the heating-boiling-cooling-reflux time is difficult to control precisely, potentially leading to overheating or insufficient heating-boiling-cooling-reflux; there is a lack of real-time monitoring, making it impossible to adjust the heating-boiling-cooling-reflux process in a timely manner; and energy efficiency is low, resulting in unnecessary heating time. This application, however, achieves intelligent control of the heating-boiling-cooling-reflux process, avoiding overheating-boiling-cooling-reflux; improving energy efficiency and reducing unnecessary heating time; and ensuring the consistency of sample processing through precise control of the heating-boiling-cooling-reflux time.

[0100] The petroleum product acidity determination equipment and method provided in this application are highly automated, intelligent, and accurate. This invention integrates multiple functional modules to achieve full automation of the entire process, from sample transport, heating, boiling, cooling, and reflux pretreatment to titration determination. In particular, the innovations in the heating, boiling, cooling, and reflux process and the determination of the titration endpoint significantly improve the accuracy and reliability of the determination. This automated determination equipment not only improves work efficiency and reduces human error but also ensures the consistency and traceability of the determination results, which is of great significance for improving the quality control level of petroleum products.

[0101] It should be understood that the terminology used herein is for the purpose of describing particular exemplary embodiments only and is not intended to be limiting. Unless the context clearly indicates otherwise, the singular forms “a,” “an,” and “” used herein may also indicate the inclusion of the plural forms. The terms “comprising,” “including,” “containing,” and “having” are inclusive and therefore indicate the presence of the stated features, steps, operations, elements, and / or components, but do not exclude the presence or addition of one or more other features, steps, operations, elements, components, and / or combinations thereof. The method steps, processes, and operations described herein are not construed as requiring them to be performed in a particular order described or illustrated, unless the order of performance is explicitly indicated. It should also be understood that additional or alternative steps may be used.

[0102] Although terms such as first, second, third, etc., may be used in this document to describe multiple elements, components, regions, layers, and / or segments, these elements, components, regions, layers, and / or segments should not be limited by these terms. These terms may be used only to distinguish one element, component, region, layer, or segment from another. Unless the context clearly indicates otherwise, terms such as "first," "second," and other numerical terms used herein do not imply order or sequence. Therefore, the first element, component, region, layer, or segment discussed below may be referred to as the second element, component, region, layer, or segment without departing from the teachings of the exemplary embodiments.

[0103] The above are merely specific embodiments of this application, enabling those skilled in the art to understand or implement this application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of this application. Therefore, this application is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features claimed herein.

Claims

1. A device for determining the acidity of petroleum products, characterized in that, It includes a body (1) and a turntable mechanism (2), a heating, boiling, cooling and reflux mechanism (3), a titration mechanism (4), a digital camera-machine vision inspection mechanism (5), and a controller (6) disposed on the body (1); The turntable mechanism (2) includes a rotatable turntable (21), which includes a first station, a second station and a third station; The first station is used to place one blank sample bottle, two sample bottles, and one waste bottle. The first station is equipped with a positioning part for supporting the sample bottle. The second station is used for the heating, boiling, cooling and reflux mechanism (3) to heat, boil and cool the sample in the sample bottle of the second station. The third station is used for the titration mechanism (4), which automatically adds indicator and titration solution to the sample bottle located at the third station; The turntable mechanism (2), heating, boiling, cooling and reflux mechanism (3), titration mechanism (4) and digital camera-machine vision inspection mechanism (5) are electrically connected to the controller (6). The digital camera-machine vision inspection mechanism (5) transmits the color information of the sample in the sample bottle to the controller (6). The controller (6) determines the titration endpoint based on the color change and displays the measurement result.

2. The petroleum product acidity measuring device according to claim 1, characterized in that, The heating, boiling, cooling, and reflux mechanism (3) includes: The lifting assembly (31) is located below the turntable (21). The lifting assembly (31) includes a pallet (311) that can move vertically. The pallet (311) is used to lift the sample bottle located at the second station. A heating assembly (32) is mounted on a tray (311) for heating the sample bottle; A condenser assembly (33) is positioned above the turntable (21). The condenser assembly (33) has a condenser chamber for connecting to the mouth of the sample bottle.

3. The petroleum product acidity measuring device according to claim 2, characterized in that, The heating, boiling, cooling, and reflux mechanism (3) also includes a detection component for detecting the liquid reflux of the condensation component (33), and the detection component is connected to the controller (6).

4. The petroleum product acidity measuring device according to claim 1, characterized in that, The titration mechanism (4) includes: A column (41) is installed on the body (1); A lifting assembly (42) is disposed on the column (41), and the lifting assembly (42) includes a lifting plate that can slide in the vertical direction; A titration assembly (43) is disposed on the lifting plate. The titration assembly (43) includes a titration connecting rod (431) and a titration nozzle (432) disposed at the bottom of the titration connecting rod (431). A rotating disk (44), the bottom of the rotatable column (41); and an indicator assembly (45), including an indicator reservoir (451) and an indicator nozzle (452) disposed on the rotating disk (44). The dropper (432) can be inserted into the indicator tip (452) and draw the indicator from the indicator reservoir (451).

5. The petroleum product acidity measuring device according to claim 4, characterized in that, The indicator tip (452) has an interface and an inlet / outlet port arranged opposite to each other. The interface is used to insert the dropper (432), and the inlet / outlet port is used to draw in and dispense the indicator.

6. The petroleum product acidity measuring device according to claim 4, characterized in that, The titration assembly (43) further includes a titrant storage tank (433) and a precision burette (434), the precision burette (434) being connected to the titrant storage tank (433) and the titration connecting rod (431).

7. The petroleum product acidity measuring device according to claim 1, characterized in that, The digital camera-machine vision inspection mechanism (5) includes an illumination unit (51) and a digital camera (52). The digital camera (52) and the illumination unit (51) are located on opposite sides of the third station. The digital camera (52) is used to capture the color change of the sample in the sample bottle under the illumination of the light source in real time and send it to the electronic controller (6) for data processing.

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